Superalloy article cleaning and repair method

Details Superalloy article cleaning and repair method Superalloy article cleaning and repair method

1977-03-17

1978-07-04

Kelly, Donald G.

Metal fusion bonding

Process

Repairing, restoring, or renewing product for reuse

29402, 164 92, 228193, 228220, 228221, 228248, B23K 3100

Patent

active

040984508

ABSTRACT:
A narrow crevice in a Ni-base superalloy article is repaired by first removal of a complex oxide of at least one metal selected from Al and Ti, by treatment of the oxide in the crevice with gaseous active fluoride ions in a non-oxidizing atmosphere at a temperature at which the oxide will react with the fluoride ions under the conditions around the oxide. The crevice is then repaired in a subsequent step such as by filling with metal or pressure bonding.

REFERENCES:
patent: 3246392 (1966-04-01), Altgelt
patent: 3758347 (1973-09-01), Stalker
patent: 4008844 (1977-02-01), Duvall
patent: 4019014 (1977-04-01), Byrne
patent: 4028787 (1977-06-01), Cretella
Brazing in Reducing Fluoride-Containing Atmosphere; E. Genieys, (Brit. Assn. for Brazing), Nov. 1972.

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